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Fritzing is an Electronic Design Automation software with a low entry barrier, suited for the needs of designers and artists. It uses the metaphor of the breadboard, so that it is easy to transfer your hardware sketch to the software. From there it is possible to create PCB layouts for turning it into a robust PCB yourself or by help of a manufacturer.

Qucs is an integrated circuit simulator which means you are able to setup a circuit with a graphical user interface (GUI) and simulate the large-signal, small-signal and noise behaviour of the circuit. After that simulation has finished you can view the simulation results on a presentation page or window.

Gnokii is a Unix/Linux tool suite for mobile phones. It provides a library to communicate with a phone hiding the communication protocol. The library handles SMS, phonebook, calendar, phone calls, and other mobile phone capabilities. It supports most of the GSM phones: Nokia ones using Nokia proprietary protocol and AT-capable ones -- using standard AT commands.

Nokryptia is a program to convert music files like MP3 to work on a Nokia 5510 cell phone. The utility also does not do any encryption, it uses in fact a bug in the encryption algorithm. Therefore, no actual encryption is done, which makes the program very fast in comparison to the official software from Nokia.

The Yagi-Uda project is a set of programmes for designing, and optimising Yagi-Uda antennas, with 2 or more elements, such as shown below. Additionally, a very simple program called dipole works with just a dipole, but its functionality is limited. Written by Dr. David Kirkby, G8WRB. email david.kirkby@onetel.net

JSON (JavaScript Object Notation) is a lightweight data-interchange format. It is easy for humans to read and write. It is easy for machines to parse and generate. It is based on a subset of the JavaScript Programming Language, Standard ECMA-262 3rd Edition - December 1999. This library provides a parser and pretty printer for converting between Haskell values and JSON.

The GNU dbm is a library of database functions that use extensible hashing and works similar to the standard UNIX dbm functions. These routines are provided to a programmer needing to create and manipulate a hashed database. This library exists in the FreeBSD base collection, but the GNU version has added functionality that is sometimes useful.

OpenTSDB is a distributed, scalable Time Series Database (TSDB) written on top of HBase. OpenTSDB was written to address a common need: store, index and serve metrics collected from computer systems (network gear, operating systems, applications) at a large scale, and make this data easily accessible and graphable.

This module helps to generate HTML forms for creating new database rows or editing existing rows. It maps column names in a database table to HTML form elements which fit the schema. Large text fields are turned into textareas, and fields with a has-a relationship to other Class::DBI tables are turned into select drop-downs populated with objects from the joined class.

This module implements an OO-interface to database schemas. Using this module, you can create a database schema with an OO Perl interface. You can read the schema from an existing database. You can save the schema to disk and restore it in a different process. Most importantly, DBIx::DBSchema can write SQL CREATE statements for different databases from a single source.